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    1   /**
    2    * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
    3    */
    4   package net.sourceforge.pmd.dcd.graph;
    5
    6   import java.util.Comparator;
    7
    8   /**
    9    * Compares MemberNodes.  FieldNodes are smaller than ConstructorNodes
    10   * which are smaller than MethodNodes.
    11   */
    12  public final class MemberNodeComparator implements Comparator<MemberNode> {
    13
    14  	public static final MemberNodeComparator INSTANCE = new MemberNodeComparator();
    15
    16  	private MemberNodeComparator() {
    17  	}
    18
    19  	public int compare(MemberNode node1, MemberNode node2) {
    20  		if (node1 instanceof FieldNode) {
    21  			if (node2 instanceof FieldNode) {
    22  				return node1.compareTo(node2);
    23  			} else {
    24  				return -1;
    25  			}
    26  		} else if (node1 instanceof ConstructorNode) {
    27  			if (node2 instanceof FieldNode) {
    28  				return 1;
    29  			} else if (node2 instanceof ConstructorNode) {
    30  				return node1.compareTo(node2);
    31  			} else {
    32  				return -1;
    33  			}
    34  		} else {
    35  			if (node2 instanceof MethodNode) {
    36  				return node1.compareTo(node2);
    37  			} else {
    38  				return 1;
    39  			}
    40  		}
    41  	}
    42  }